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Test NTC-8A: Checking Map Sensor

NOTE: Perform TEST NTC-1A  or TEST NTC-7A  before proceeding.

Turn engine off. Tee a vacuum gauge to a manifold vacuum source. Start engine. Allow engine to idle. If engine will not idle, maintain a constant RPM above idle. Using scan tool, read Manifold Absolute Pressure (MAP) sensor vacuum. If scan tool vacuum reading is within one in. Hg of vacuum gauge reading, MAP sensor is functioning properly. Test is complete. If scan tool vacuum reading is not within one in. Hg of vacuum gauge reading, replace MAP sensor. Perform TEST VER-2A .

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